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Femtosecond ultrasonic spectroscopy using a piezoelectric nanolayer: Hypersound attenuation in vitreous silica films
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10.1063/1.3620879
/content/aip/journal/apl/99/5/10.1063/1.3620879
http://aip.metastore.ingenta.com/content/aip/journal/apl/99/5/10.1063/1.3620879
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) Measured optical transmission changes ΔT as a function of time delay (solid line). The slowly decaying background is depicted by the dotted line. The two acoustic echoes at the first 15 ps are plotted in red. The insets show the echo signal clarified by removing the charge and Brillouin backgrounds (Left) and schematic diagram of the nanoultrasonic experiment (Right), where the two echoes are labeled by E1 and E2.

Image of FIG. 2.
FIG. 2.

(Color online) Fourier power spectra of the echo E1 (solid circles) and E2 (open circles). The horizontal dotted line denotes the noise level of the system, corresponding to ΔT/T ∼ 10−6. The inset shows the power reflectivity of coherent waves at the two interfaces.

Image of FIG. 3.
FIG. 3.

(Color online) Acoustic attenuation coefficient of v-SiO2. The colored region shows the sound attenuation at 0.65-1 THz where only the lower bound of Γ is determined from the presented experiment. Data from the previous picosecond ultrasonic measurements are also shown for comparison. The thin line with a slope of 2 is a guide for eye.

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/content/aip/journal/apl/99/5/10.1063/1.3620879
2011-08-04
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Femtosecond ultrasonic spectroscopy using a piezoelectric nanolayer: Hypersound attenuation in vitreous silica films
http://aip.metastore.ingenta.com/content/aip/journal/apl/99/5/10.1063/1.3620879
10.1063/1.3620879
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